CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current Assets:
Cash and cash equivalents	$ 13,293	$ 16,055
Restricted cash	69,261	0
Accounts receivable	346,896	351,573
Inventories	46,532	35,098
Hedging asset	315,546	130,412
Other	44,592	47,755
Total current assets	836,120	580,893
Property and Equipment:
Gas and oil properties, using the full cost method, including $870.2 million in 2011 and $712.1 million in 2010 excluded from amortization	8,974,350	7,749,863
Gathering systems	958,105	817,465
Other	511,938	413,557
Total property and equipment	10,444,393	8,980,885
Less: Accumulated depreciation, depletion and amortization	4,230,121	3,682,688
Property and equipment, net	6,214,272	5,298,197
Other Assets	163,715	138,373
TOTAL ASSETS	7,214,107	6,017,463
Current Liabilities:
Current portion of long-term debt	1,200	1,200
Accounts payable	487,186	473,890
Taxes payable	28,887	50,051
Interest payable	10,589	19,954
Advances from partners	96,274	81,705
Hedging liability	9,071	7,685
Current deferred income taxes	115,869	44,089
Other	17,174	15,409
Total current liabilities	766,250	693,983
Long-Term Debt	1,271,000	1,093,000
Other Liabilities:
Deferred income taxes	1,461,205	1,130,292
Long-term hedging liability	4,582	40,188
Pension and other postretirement liabilities	13,629	15,777
Other long-term liabilities	88,888	79,347
Total Other Liabilities	1,568,304	1,265,604
Commitments and Contingencies
Equity:
Common stock, $0.01 par value; authorized 1,250,000,000 shares in 2011 and 2010; issued 348,264,799 shares in 2011 and 347,733,839 in 2010	3,483	3,477
Additional paid-in capital	880,425	862,423
Retained earnings	2,497,681	2,018,445
Accumulated other comprehensive income	229,750	83,975
Common stock in treasury, 125,984 shares in 2011 and 156,636 in 2010	(2,786)	(3,444)
Total Equity	3,608,553	2,964,876
TOTAL LIABILITIES AND EQUITY	$ 7,214,107	$ 6,017,463